160 



PLANT RELATIONS. 



scattered also over the inner surface of the blade. These 

 glands excrete a clear, sticky fluid, which hangs to them m 

 drops like dew-drops. If a small insect becomes entangled 



Fig. 151. Plants of Dioncea, Bhowing the rosette habit of the leaves with terminal 

 traps, and the erect flowering st«m.— After Keener. 



in the sticky dnip. the hair begins to ourvo inward, and 

 presently ])rcsses its victim down upon the surface of the 

 blade. In the case of larger insects, sovei-:il of the marginal 

 hairs may join together in holding it, or the whole blade 

 may become more or less rolled inward. 



